2 - 2 If children do not hold a valid vaccination certificate, are children also required a COVID-19 negative certificate?
For children under the age of 18 without holding a valid vaccination certificate, if they are accompanied by a guardian with a valid vaccination certificate and who will supervise the children, they will be treated as holders of valid vaccination certificates. Therefore the submission of the negative certificates is exempted the same as the guardian as an exception.
In case the accompanying guardian does not hold a valid vaccination certificate and enters Japan with a negative certificate, preschool-aged children (generally under the age of 6) are not required a negative certificate.
*If children under the age of 18 without holding vaccination certificates enter Japan alone (without being accompanied by a guardian with a valid vaccination certificate), they are not eligible for the above exception.
From 厚生劳动省